baber/WOPTO huggingface dataset:
Patent GB-1340350-A (GB)
Title: Surface controlled avalanche semiconductor device
IPC: H01L29/00
Filed: 1971-07-09
Abstract: 1340350 Semi-conductor devices SIGNETICS CORP 9 July 1971 [13 July 1970] 32361/71 Heading H1K A surface controlled avalanche transistor is manufactured as follows: an epitaxial layer 17 of one conductivity type is deposited on a silicon substrate 16, also of the one conductivity type and of lower resistivity, and an oxide film formed on the layer 17; using a photo-resist technique a plurality of pillars 21, are produced from the film, arranged in groups with spaces 22 therebetween, and a dopant of the opposite conductivity type diffused into the surface of the epitaxial layer between the pillars 21, to form regions 23; the pillars are removed and a fresh oxide layer 26 deposited on the epitaxial surface; the layer 26 is etched at spaces 22 to form openings 27 thereto and a metal layer, e.g. of aluminium deposited on the oxide layer 26 and in the openings; the metal layer is masked and etched to form a gate contact 32 overlying the areas of the device containing the PN junctions, and a source contact 31 making contact to the region of the layer at 22, of the opposite conductivity type. The PN junctions 24 between region 23 and the epitaxial layer take the form of closed figures, which may be circular, and the gate and source contacts may be interdigitated, as shown. The device may be bonded to a header by flip-chip bonding using further insulating and metal contact layers deposited on the surface of the device. In an alternative embodiment the gate contact may be circular, encirling a central source contact. Boron may be used as a dopant, and the spacing between PN junctions determines the frequency of operation, normally VHF or UHF.
Patent GB-384424-A (GB)
Title: Improvements relating to variable pitch propellers
IPC: B64C11/42
Filed: 1931-11-24
Abstract: 384,424. Screw propellers. ROE & CO., Ltd., A. V., DOBSON, R. H., and LEECH, L., Newton Heath, Manchester. Nov. 24, 1931, No. 32525. [Class 114.] In variable pitch screw propellers there is interposed between the driving shaft and the propeller shaft and a toothed wheel by which the blades are turned for pitch adjustment, an epicyclic and a differential gear whereby the propeller shaft and the pitch changing wheel normally rotate as one and manual means are provided acting through the differential to the said wheel for advancing and retarding it relatively to the propeller shaft together with means for locking the blade in position after each adjustment. The propeller blade a carries at its root a bevel wheel b which meshes with a bevel wheel c keyed to a sleeve o the rotation of this sleeve relative to the propeller shaft d providing a pitch adjustment thereof. The blade root also has a series of serrations e into which may be forced a locking or braking band f. The engine shaft drives an internal toothed annulus i which engages planet pinions j carried by a ring or spider k and other planet pinions m carried by a second spider upon the sleeve o. The pinions j also mesh with teeth p on a fixed part q which constitutes a sun wheel and is secured to an engine crank case r, whilst pinions m mesh with teeth s upon a sun ring t which can be turned in either direction by a worm under manual control. The shaft of the worm u has a locking member v which is releasable by oil pressure acting upon a spring-loaded plunger w. The movement of the wedge which releases the brake f is also effected by oil pressure acting upon a piston or plunger connected to the wedge and such oil pressure is obtained from the engine oil circulation system through a control valve y which may be moved by the pilot when he desires to adjust the pitch. Having moved this valve by linkages 6, 8, by an axial movement of the shaft 3, the shaft is then engaged with a pin 10 on a shaft 4 which, by turning the control wheel 2, rotates bevel wheels 11, 12, the latter of which is on the shaft of the worm u.
Patent GB-870260-A (GB)
Title: Improvements in and relating to hand flat knitting machines
IPC: D04B15/06
Filed: 1957-10-18
Abstract: 870,260. Knitting-machines. STEINHOF, K. Oct. 18, 1957 [Oct. 25, 1956], No. 32557/57. Class 74 (2). The look of a hand-operated flat knitting  machine is provided with two stitch cams 2, 3, alternating with two clearing cams 4, 5, the outside cams 2, 5 being raisable individually to inoperative position against the base plate of the lock, so that either the outside stitch cam 2 may be inactivated and the yarn laid by hand in the needle hooks after each traverse of the lock, or the outside clearing cam 5 may be inactivated and the yarn laid by a yarn guide traversing with the lock. For this purpose, the cams 2, 5 are mounted on pins 6, 7. The stitch cam 3 is also mounted on a pin 6<SP>1</SP> and, to permit variation of the stitch length, the pins 6, 61 are engaged by the forked outer ends of levers 18, 19 pivoted at 20, 21 to the lock base plate and coupled by a block 39 slidable in a slot 40 in the base plate and bearing a pin 22 which engages slots 23, 41 in the levers. The inner arm of the lever 18 is prolonged and forked to engage a pin 24 movable by a spiral cam on a disc 25 by rotation of which the levers are thus swung simultaneously and the cams 2, 3 adjusted. The sinkers may be as in Fig. 5, a cam 16 on the lock moving them so that the loops are drawn on the edges of the sinkers below the throats 15; the portion 9 of each sinker is extended forwardly, so that when the needles are fully advanced, the open latches 11 will be between the front sinker edges 12 down which the yarn will slide into the open hooks, being prevented from being caught behind the open latches. Alternatively the sinkers may be as in Fig. 6. Here, springs 30 urge the sinkers into casting-off position (dotted); and, during loop drawing, the yarn drawn against the belly 32 rocks the sinker back in the direction of the arrow 33, against a stop 34, adjustable as indicated by arrow 35, to vary the loop length. In a machine in which the yarn is laid by hand, the sinkers may be as at 13, Fig. 3, pivoting at 59 in tricks 57 in the bed 58 and raised to the dotted line position by a cam 16 on the cam plate, against the action of spring 60.
Patent GB-1387655-A (GB)
Title: Gas-heated crucible furnaces
IPC: C21D1/44
Filed: 1972-07-12
Abstract: 1387655 Crucible furnace; infra-red burners REX PRODUCTS Inc 12 July 1972 [12 July 1971] 32563/72 Headings F4B and F4T A crucible furnace is heated by burners, each having a gas pervious radiating element arranged to face a wall of the crubicle. A long narrow box shaped crucible 11 is mounted in a framework, and burners 14 are mounted on side walls 17 so that they can be swung away from the crucible for maintenance or inspection. Insulation I is arranged to seal the edges of the burner space and an exhaust port 49 is arranged at one end of the casing. Each burner Fig. 5, comprises a manifold 46 connected to the supply line 20 and through a control valve 45 to a chamber 41. The front of the chamber is closed by a gas pervious tile 42, on the surface of which the gas mixture burns. The tiles 42 are protected by incandescent meshes 44. Supply valves and ignition devices are arranged within the casing (Fig. 2). The individual valves 45 for each burner enables the crucible to be heated easily.
Patent GB-204591-A (GB)
Title: Improvements in letter files
IPC: B42F9/00
Filed: 1922-11-29
Abstract: 204,591. Crocker, S. H. Nov. 29, 1922. Clamping - devices; locking - followers. - Letters &c. x are held by a gripping-plate e slidably mounted upon a post a and carrying a locking-lever furnished with an incline n adapted to engage the undersurface of a lock. ing-plate o, which is furnished with lugs p adapted to grip the post a. The post a is formed with or secured to a base b adapted to be secured to a cover &c. g by eyelets &c. d, the base being pointed and rounded at c to facilitate insertion of the letters &c. The lever is furnished with pintles engaging holes in lugs f, g on the plate e. Preferably, the lug g extends through the plate o and is furnished with lugs q to engage the post a. To retain the plates e, o, the post a is furnished with a suitable stop, or the upper end is bent as at r.
Patent GB-1029342-A (GB)
Title: Process for the production of manganese phosphate coatings on iron and steel
IPC: C23C22/18
Filed: 1964-08-13
Abstract: A clean ferrous surface is coated with manganese phosphate using an acid manganese phospate solution with an oxidising agent, and having a ratio of free P2O5 to total P2O5 of between 0.35 and 0.55.  A preferred solution comprises 3 to 20 g./1. of Mn, 4-25 g./1. of P2O5, 2 to 50 g./1.NO3, and 0.2 to 1.0 g./1. of Ni and has a free to total ratio of P2O5 between 0.40 to 0.50.  The ratio may be adjusted by adding non-interfering anions, e.g. sulphate of chloride or non-interfering cations, e.g. sodium or potassium. In an example a steel piston is cleaned in an organic solvent, e.g. perchloroethylene, and dipped in the solution for 2 minutes at 95 DEG C.
Patent GB-1082267-A (GB)
Title: Process for producing beryllium copper base alloys and products
IPC: C22C9/00
Filed: 1965-08-03
Abstract: An extruded free-machining article comprises an alloy consisting of:- <TABS:1082267/C6-C7/1> the balance, apart from incidental impurities, being copper.  In examples the alloy billet is homogenized at 1350 DEG F., extruded at 1300 DEG -1450 DEG F. with pressures of 45,000 to 200,000 p.s.i., solution treated at 1450 DEG F., water quenched, drawn 37% and aged at 600 DEG F.
Patent GB-458580-A (GB)
Title: Improved apparatus for arc welding
IPC: B23K9/133
Filed: 1935-06-15
Abstract: 458,580. Uniting by fusion. BABCOCK & WILCOX, Ltd., Babcock House, Farringdon Street, London.-(Assignees of Trainer, J. E.; Ridgewood Road, Akron, Ohio, U.S.A.) June 15, 1935, No. 33124/36. Convention date, June 16, 1934. Divided out of 458,269. Drawings to Specification. [Class 83 (iv)] In an arc welding machine for effecting longitudinal as well as transverse welds, the welding head carries one means for feeding the weld rod when effecting longitudinal welds and a second means spaced from the first for feeding the rod when effecting transverse welds. The feeding means may consist of pairs of rubber rollers arranged in planes at right angles to one another. A coated rod is used, provided with bare contact portions which extend therefrom in the same direction as the roll axes so as to reduce wear on the rollers. Specification 458,269 is referred to. A full abridgment of the machine will be found in connection with Specification 462,895.
Patent GB-1213166-A (GB)
Title: Novel cyanoethanols, their synthesis and their conversion to derivatives
Inventor: BAKER JAMES ALBERT
IPC: C07D265/10
Filed: 1967-07-19
Abstract: 1,213,166. Hydroxymethyl-araliphatic nitriles. ASPRO-NICHOLAS Ltd. 17 July, 1968 [19 July, 1967], No. 33189/67. Heading C2C. The invention comprises compounds of formula R<SP>1</SP>R<SP>2</SP>C(CN)CH 2 OH, wherein R<SP>1</SP> is aryl and R<SP>2</SP> is alkyl, and a process for making them by reacting R<SP>1</SP>R<SP>2</SP>CHCN with CH 2 O in an inert medium in presence of a basic quaternary ammonium hydroxide or alkoxide. 2 - Hydroxymethyl - 2 - phenylbutylamine, prepared by reducing (H 2 /Ni) 2 - hydroxymethyl - 2 - phenylbutyronitrile, reacts with Ph 2 CO 3  to give 5 - ethyl - 5 - phenyltetrahydro- [2H]-1,3-oxazin-2-one.
Patent GB-1486690-A (GB)
Title: Process for the manufacture of adhesive resins
IPC: C08F232/04
Filed: 1975-08-08
Abstract: 1486690 Dicyclohexenyl dimethyl methane resins; adhesive compositions BEIERSDORF AG 8 Aug 1975 [8 Aug 1974] 33209/75 Heading C3P Adhesive resins are prepared by polymerizing in the presence of a Friedel-Crafts catalyst dimethyl-dicyclohexen-3-yl-methane alone or together with a mono- or di-ethylenically unsaturated hydrocarbon or chlorohydrocarbon containing 4 to 12 carbon atoms as comonomer, the mole ratio of dimethyl-dicyclohexen-3-yl-methane to comonomer, if present, being up to 1 : 2. The preferred comonomers are α-pinene, #- pinene, dipentene, cyclopentadiene, vinylcyclohexene, cyclododecene, styrene, butadiene, isoprene or chloroprene. Pressure sensitive adhesive compositions comprise the adhesive resin and a natural and/or synthetic rubber, a polyolefin, polyacrylate, polyvinylacetate, polyamide or polyester. The adhesive resin may also be used with ethylene/ vinyl acetate copolymers or polyamides in hot melt adhesives.
Patent GB-176091-A (GB)
Title: Improvements in and in relation to chick brooders and foster mothers
IPC: A01K31/19
Filed: 1920-11-26
Abstract: 176,091. Hebditch, W. Nov. 26, 1920. Rearing-appliances. - In a foster-mother, a centrally-arranged lamp 18 is surrounded by a flue 4 which conducts the combustion products to a space 13 between the inner and outer roofs 6, 14, the lower end of the flue resting upon the floor 2 of the foster-mother, surrounding an aperture which admits air to the lamp and the flue. The flue gases escape from the space 13 by apertures 12 which are adjusted by turning the upper part 14 relatively to the lower part 6. A heatretaining shield 25 is fitted centrally. Within the flue 4 is a baffle 22 to cause the fumes to heat the flue wall, which is surrounded by the air-inlet passage 10 connected with the atmosphere by a pipe 23 above or below the floor 2 and with the interior by apertures 24. The passage of air may be increased by raising the roof from the wall 1 by inserting a distance-piece beneath the sleeve 8 on which the wall is supported. Baffles may be arranged over the air inlets 20 to shield the lamp from draughts, and a plate 19 is provided to shield the lamp reservoir from the heat. The milled head of the wick turner 27 may be mounted telescopically so that it can be pushed inside the foster-mother wall and covered by a slide.
Patent GB-931559-A (GB)
Title: Creaseproofing of cellulosic materials
IPC: C07D239/10
Filed: 1959-10-01
Abstract: Cellulosic fabric is crease-proofed by impregnating the material with an aqueous solution comprising a latent acidic catalyst and a creaseproofing compound having the general formula <FORM:0931559/IV(a)/1> wherein X is oxygen or sulphur and either (i) R is hydrogen and R1 is hydrogen as (ii) R is hydrogen or a C1-4 alkyl group and R1 is hydroxyl, and then drying the material and heating to cure the crease-proofing compound.  The crease-proofing compounds may be admixed with a textile lubricant, latent acidic catalyst and a dispersing agent to form a concentrate which is diluted with water before use.  In examples, cotton fabric is treated with an aqueous solution of (1) 1,3-dimethylol-hexahydropyrimidone-2 and zinc nitrate; (2) 1,3-dimethylol hexahydropyrimidthione-2 and mono-ammonium phosphate or (3) 1,3-dimethylol hexahydropyrimidone-2, emulsifiable polyethylene wax, polyethoxy nonyl phenol and 2-amino-2-methyl-1-propanol hydrochloride.  Curing is preferably effected at 150 DEG -250 DEG C.  Specification 931,560 is referred to.
Patent GB-325271-A (GB)
Title: Improvements relating to coin-freed apparatus
Filed: 1928-11-15
Abstract: .325,271. Mansfield, T. J. Nov. 15, 1928. Testing coins; clearing apparatus, automatic.- The runway, shown in elevation in Fig. 1 and in plan in Fig. 2, comprises opposed grooved rails, channels 3<a>, 3<b> curved in plan and engaging the coin only at the top and bottom so that undersized coins fall out by centrifugal force through the open convex side of the runway. As shown the rails are provided with V-shaped grooves so that a thin coin of correct diameter rides too low in the rail 3<b> and loses support at 3a. To aid in rejecting undersized coins, the coin slit 1 is inclined and the rails are correspondingly displaced at the end near the coin slit so that initially the coin is inclined as at 4, Fig. 3. A magnet 11 retains iron discs &c. Coins jammed in the runway or held by the magnet are cleared by an initial movement of the delivery drawer. This movement may form no part of the coin-freed action. The drawer acts through levers, Fig. 5 (not shown) to depress the rail 3b about a pivot 10, the rail 3<b> engaging one arm 15 of a bellcrank lever so as to move a plate 13 past the poles of the magnet. The lever 15, 13 and the rail 3<b> are returned by a spring 16.
Patent GB-1107730-A (GB)
Title: A float valve for a carburettor and a method of making same
IPC: F02M5/12
Filed: 1965-08-06
Abstract: 1,107,730. Moulding float valves. A.C.F. INDUSTRIES Inc. 6 Aug., 1965 [21 Sept., 1964], No. 33829/65. Heading B5A. [Also in Divisions F1 and F2] When moulding a resilient (e.g. rubber) tip on to a carburetter float valve 32 having three longitudinal ribs 31, a die portion 82 is placed on the mould 74 so that a shoulder, defined by cylindrical and planar surfaces 88 and 90 respectively, deforms an outwardly flared ring 54 of the valve body. The tip is anchored in a bore 50 and an annular gap 58 between ring 54 and an inner ring 56, the latter being fractured at 62 to improve the anchorage. In a modification, Fig. 10 (not shown), surface 90 includes a frusto-conical portion between two planar parts.
Patent GB-979180-A (GB)
Title: Bimetal relays
IPC: H01H53/015
Filed: 1962-09-04
Abstract: 979,180. Thermal switches; switches partly electromagnetic. LANDIS & GYR A.G. Sept. 4, 1962 [Nov. 8, 1961; July 18, 1962], No. 33836/62. Heading H2B. A bimetal relay includes one or more bimetal contact devices thermally controlled by a control element which is mounted for movement relatively to the contact devices and actuated by a measuring element. One form of control element is a heated plate 10 movable between two connected contact-carrying bimetal strips 3, 4 by a flat coil 16 mounted for movement in the direction of the arrows between two permanent magnets 17, 18, the arrangement 16/17/18 with supply conductors 19, 20, comprising the measuring element 15. Movement of plate 10 by coil 16 causes the bimetal system 3/5/4 to deviate from its central position to close contacts 1, 6, or 2, 7, e.g. to start up a servomotor 9 in one or other direction. Plate 10 may be a non-heated plate acting as a heat sink between two connected heated bimetals (Fig. 2 not shown), or may be a heat conducting block with a heating coil fixed to the shaft of a rotor coil measuring mechanism for movement between bimetal contact devices (Fig. 3, not shown). Bimetals 3, 4 are connected together to compensate for ambient temperature variation.
Patent GB-873957-A (GB)
Title: Improvements in magnetic core logical devices
IPC: G06F7/38
Filed: 1957-10-30
Abstract: 873,957. Magnetic core storage devices. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 30, 1957 [Oct 30, 1956], No. 33927/57. Class 38 (2). [Also in Groups XIX and XXXIX] In a full-adder (see Group XIX and Fig. 4, not shown) an apertured core, Fig. 3, having inputs 62 and an output 63 is used to produce a " carry " digit, the logical equivalent of the core being shown in Fig. 3A. A further core having four adjacent apertures is used to produce the sum." digit. An alternative arrangement for producing the carry digit by means of a core having three apertures is described (Fig. 4A, not shown) and an " exclusive or " circuit using a core having two apertures is also described (Fig. ], not shown). Specifications 854,447 and 858,338 are referred to. Reference has been directed by the Comptroller to Specification 814,455.
Patent GB-1079214-A (GB)
Title: Improvements in or relating to welding electrodes
IPC: B23K35/30
Filed: 1964-08-19
Abstract: A steel weld deposit comprises:- .0-0.12%.C .4.5-6%.Cr .0.4-2.25%.Mo .0-0.75%.Mn .0-0.9%.Si the balance being iron
Patent GB-1392777-A (GB)
Title: Seed delinter
IPC: D01B1/06
Filed: 1973-07-17
Abstract: 1392777 Cotton seed delinting apparatus ANDERSON CLAYTON & CO 17 July 1973 34045/73 Heading DIN  An apparatus for delinting cottonseed comprises a generally cylindrical casing 12 partially lined with abrasive material 20, a rotor 24 disposed within the casing and journalled to rotate therein leaving an annular space 42 between itself and the casing, a seed inlet 44 to the annular space, a lint outlet 58 in the unlined portion of the casing wall, a finger plate 62 between the rotor and the lint outlet and means to cause a stream of air to flow into the casing and out through the lint outlet. An adjustable seed outlet 52 is disposed at each end of the machine and air is admitted through apertures 68 in each end plate to entrain lint through the outlet 58. A suitable suction pump may be provided in the outlet conduit. A trash separation grill 70 is provided at the bottom and means such as a conveyor may remove trash from the hopper 72 beneath it. The casing geometry may be adjusted by means of the turnbuckles 76, 78. The rotor peripheral speed is preferably between 1800 and 3800 ft/min, the clearance between rotor and casing 5/16 to 3/4 inch, and the abrasive is e.g. silicon carbide in the range 16 to 100 grit coarsness, or preferably 54 to 60. Vanes 32 on the rotor are e.g. steel, wood or aluminium. The abrasive may be in discrete bricks, as shown, or in a single unitary structure.
Patent GB-340702-A (GB)
Title: Improved satchel or bag
IPC: B62J9/00
Filed: 1929-11-08
Abstract: 340,702. Satchels &c. SMITH, W. B., Allcroft Works, Spring Road, Hall Green, Birmingham. Nov. 8, 1929, No. 34080. [Class 133.] A satchel or bag comprises a flexible external part attached to a foldable metal framework consisting of two side frames c, Fig. 2, connected at the ends by oblique transverse stays d. Each side frame comprises top, bottom, and end bars. This framework is permanently connected by rivets, as at f, Fig. 1, to the flexible exterior structure, which comprises sides a2, a<3>, ends a4, bottom a<5>, foldable flaps a<6> at the ends, and a foldable flap a<7> at one side, to close over the top of the end flaps after they have been folded inwardly and secured together by tapes a<8>. The oblique stays, d, allow the sides of the metal framework to fold close to one another or to open out carrying the exterior structure with them. A stop device d<4> limits the opening out of the framework. A flexible wire container g, Fig. 3, adapted to be removably secured inside the exterior structure by snapbutton or like fastenings h, is conveniently made of waterproof material, and its upper edges are provided with a draw string g<3>. By securing a suitable metal bracket to the bottom bar of the framework, and providing the top bar with straps and buckles, the satchel may be attached to the frame of a cycle.
Patent GB-639689-A (GB)
Title: Improvements relating to telemetering systems
IPC: G08C19/22
Filed: 1947-12-24
Abstract: 639,689. Pulse delaying circuits. HIGHAM, E. H., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Dec. 24, 1947, No. 34200. [Classes 40 (v) and 40 (vi)] [Also in Group XXXVIII] A wireless system for transmitting, e.g., telemetering information, comprises means for varying the length of each pulse from a pulse generator in accordance with the instantaneous magnitude of a variable to be measured, the pulses being applied to an oscillator to produce trains of oscillations for periods proportional to the length of the corresponding pulses. The valve V1 (Fig. 1), produces a sawtooth wave as shown by A (Fig. 2) which is applied to the pulse generator valves V2, V4, the start of the pulse, as shown by B (Fig. 2) being determined by an input voltage to V4 from terminals IN obtained from the variable to be measured, and persisting to the end of the cycle. These negative pulses are fed to oscillator valves V5, V6 to allow oscillations only during the marking time of the pulses, as shown by C (Fig. 2). Alternately, the oscillator may be continuously running, but fed through a gating circuit controlled by the pulses.